/*
 * This is Melet, a salary slip designer. Feed it with data regarding to salary payment, prepare it for print through the graphical presentation, and you have it done.
 * Copyright (C) 2014, AFDiaX
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This program is based on UMLet, a Free UML Tool for Fast UML Diagrams.
 * To contact the authors of UMLet visit https://code.google.com/p/umlet/people/list
 * To contact the authors of Melet visit https://gna.org/users/gabocze
 */
package com.baselet.control.basics.geom;

/**
 * an immutable point with double coordinates
 * must be immutable because equals and hashcode is overwritten and sets and maps can contain PointDouble as keys
 */
public class PointDouble {

	public final Double x;
	public final Double y;

	public PointDouble(double x, double y) {
		super();
		this.x = x;
		this.y = y;
	}

	public Double getX() {
		return x;
	}

	public Double getY() {
		return y;
	}

	public double distance(PointDouble o) {
		double distX = o.getX() - getX();
		double distY = o.getY() - getY();
		return Math.sqrt(distX * distX + distY * distY);
	}

	public PointDouble copy() {
		return new PointDouble(x, y);
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + (x == null ? 0 : x.hashCode());
		result = prime * result + (y == null ? 0 : y.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		PointDouble other = (PointDouble) obj;
		if (x == null) {
			if (other.x != null) {
				return false;
			}
		}
		else if (!x.equals(other.x)) {
			return false;
		}
		if (y == null) {
			if (other.y != null) {
				return false;
			}
		}
		else if (!y.equals(other.y)) {
			return false;
		}
		return true;
	}

	@Override
	public String toString() {
		return "p(x=" + x + " y=" + y + ")";
	}

}
